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climate change(2)
huaihe river basin(2)
5-year-sliding average(1)
abnormal first and last frost date(1)
agricultural meteorology(1)
agro-meteorology(1)
climate trend rate(1)
cumulative anomaly(1)
desert plants(1)
frequency(1)
frost period(1)
gansu province(1)
global warming(1)
growing season(1)
growth period(1)
hazard index(1)
late frost(1)
ndvi(1)
normalized difference vegetation index(1)
northern hemisphere(1)
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